FileHashGen

This code prompts the user to enter the file path using the question method of the readline interface, and then calculates the SHA-256 hash of the file using the crypto module. The hash is calculated by reading the file into a buffer using the fs module, and then passing the buffer to the update method of the createHash function. The digest method is then used to convert the hash to a hexadecimal string, which is output to the console. Finally, the readline interface is closed.

Here is a summary of what each line of code does:

• const fs = require('fs'): This line imports the fs (file system) module, which provides functions for interacting with the file system, such as reading and writing files.
• const crypto = require('crypto'): This line imports the crypto module, which provides cryptographic functionality, including functions for calculating hashes.
• const readline = require('readline'): This line imports the readline module, which provides an interface for reading input from the command line.
• const rl = readline.createInterface({ input: process.stdin, output: process.stdout }): This line creates a readline interface with process.stdin as the input stream and process.stdout as the output stream.
• rl.question('Enter the file path: ', (filePath) => {...}): This line prompts the user to enter the file path using the question method of the readline interface, and passes the user's input to a callback function as the filePath argument.
• const fileBuffer = fs.readFileSync(filePath): This line reads the file into a buffer using the readFileSync function of the fs module.
• const hash = crypto.createHash('sha256').update(fileBuffer).digest('hex'): This line calculates the SHA-256 hash of the file buffer using the createHash function of the crypto module, and converts the hash to a hexadecimal string using the digest method.
• console.log(hash): This line outputs the hash to the console.
• rl.close(): This line closes the readline interface.